JP7359377B2 - オキシトシン産生促進剤 - Google Patents
オキシトシン産生促進剤 Download PDFInfo
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- JP7359377B2 JP7359377B2 JP2019103603A JP2019103603A JP7359377B2 JP 7359377 B2 JP7359377 B2 JP 7359377B2 JP 2019103603 A JP2019103603 A JP 2019103603A JP 2019103603 A JP2019103603 A JP 2019103603A JP 7359377 B2 JP7359377 B2 JP 7359377B2
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- oxytocin
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Description
[1] 1,5-アンヒドロフルクトース又はその類似体を含む、オキシトシン産生促進剤。
[2] 前記類似体が3-デオキシ-1,5-アンヒドロフルクトースである、上記[1]に記載のオキシトシン産生促進剤。
[3] 上記[1]又は[2]に記載のオキシトシン産生促進剤を含む、オキシトシン産生促進用食品。
[4] 上記[1]又は[2]に記載のオキシトシン産生促進剤を含む、オキシトシン産生促進用飼料。
[5] 上記[1]又は[2]に記載のオキシトシン産生促進剤を含む、オキシトシン産生促進用医薬。
[6] オキシトシン欠乏を伴う疾患又は状態を有する対象におけるオキシトシン産生促進用の、上記[5]に記載の医薬。
[7] 前記疾患が精神・神経疾患である、上記[6]に記載の医薬。
[8] 食欲抑制のための、上記[3]に記載の食品。
[9] 食欲抑制のための、上記[4]に記載の飼料。
[10] 食欲抑制のための、上記[5]に記載の医薬。
本発明は、オキシトシン産生促進作用を有する、1,5-アンヒドロフルクトース又はその類似体と、その用途に関する。
1,5-D-アンヒドロフルクトース(1,5-AF)の経口投与が、摂食量に影響を与えるかどうかを評価した。
1,5-AFの脳内投与が、摂食量に影響を与えるかどうかを評価した。実験動物としては、8週齢のC57B/6J雄性マウスを用いた。マウスを手術し、脳定位固定装置を用いて麻酔下で金属カニューレを脳内に留置した。手術後のマウスは個別ケージ内で1週間以上予備飼育し馴化させた。実験当日の18時00分から1時間絶食させ、金属カニューレに30Gの注射針を挿入し、その注射針に連結したマイクロシリンジを用いて側脳室内に試験液3μlを投与した。試験液としては、対照群のマウスに生理食塩水(3μl)、試験群のマウスには生理食塩水に溶解した1,5-AF(0.3μg/3μl)を投与した。19時00分から試験液を投与し、19時30分からCE-2飼料(日本クレア)をマウスに自由摂食させ、24時間の摂食量を測定した。
1,5-AFの投与によって活性化される脳内部位を、神経活性化マーカーであるc-Fosの発現量を指標として、免疫染色法を用いて調べた。c-Fosは、極初期遺伝子(immediate early gene)の1種であり、ニューロンの活性化に伴い発現量が上昇する核内タンパク質である。
1,5-AF投与後の室傍核における神経ペプチドの発現量変動を調べ、摂食量低減をもたらす遺伝子の同定を試みた。
5' -CATCTCTGACATGGAGCTGAGA-3' (配列番号1)
5' -GGCAGGTAGTTCTCCTCCTG-3' (配列番号2)
CRH特異的プライマー:
5' -TCTCTCTGGATCTCACCTTCCACC-3'(配列番号3)
5' -AGCTTGCTGAGCTAACTGCTCTGC-3'(配列番号4)
NUCB2特異的プライマー:
5' -GTCACAAAGTGAGGACGAGACTG-3' (配列番号5)
5' -TGGTTCAGGTGTTCAAACTGCTTC-3'(配列番号6)
Oxy特異的プライマー:
5' -TGTGCTGGACCTGGATATGCGCA-3' (配列番号7)
5' -GGCAGGTAGTTCTCCTCCTG-3' (配列番号8)
以下の工程1~8に従って、3-デオキシ-1,5-アンヒドロフルクトース(3-デオキシ-1,5-AF)を合成した。
化合物9 1H NMR(600MHz, CDCl3): δ2.50(dd,1H), 2.98(dd,1H), 3.54-3.59(m,1H), 3.85-3.97(m,2H), 3.99(d,1H), 4.15(d,1H), 4.19-4.25(m,1H).
3-デオキシ-1,5-AFの脳内投与が、摂食量に影響を与えるかどうかを評価した。実験動物としては、8週齢のC57B/6J雄性マウスを用いた。マウスを手術し、脳定位固定装置を用いて麻酔下で金属カニューレを脳内に留置した。手術後のマウスは個別ケージ内で1週間以上予備飼育し馴化させた。実験当日の18時00分から1時間絶食させ、金属カニューレに30Gの注射針を挿入し、その注射針に連結したマイクロシリンジを用いて側脳室内に試験液2μlを投与した。試験液としては、対照群のマウスに生理食塩水(2μl)、試験群のマウスには、実施例5に従って合成し生理食塩水に溶解した3-デオキシ-1,5-AF(1μg/2μl)を投与した。19時00分から試験液を投与し、19時30分からCE-2飼料(日本クレア)をマウスに自由摂食させ、1時間及び2時間の摂食量を測定した。
3-デオキシ-1,5-AFの脳内投与が、室傍核オキシトシンニューロンを活性化するかどうかを、神経活性化マーカーであるc-Fosの発現量を指標として、免疫染色法を用いて調べた。実験動物としては、8週齢のC57B/6J雄性マウスを用いた。マウスを手術し、脳定位固定装置を用いて麻酔下で金属カニューレを脳内に留置した。手術後のマウスは個別ケージ内で1週間以上予備飼育し馴化させた。実験当日の18時00分から1時間絶食させ、金属カニューレに30Gの注射針を挿入し、その注射針に連結したマイクロシリンジを用いて側脳室内に試験液2μlを投与した。試験液としては、対照群のマウスに生理食塩水(2μl)、試験群のマウスには生理食塩水に溶解した3-デオキシ-1,5-AF(1μg/2μl)を投与した。19時00分から試験液を投与し、投与開始の90分後に4%パラホルムアルデヒド溶液にて灌流固定を行い、脳を摘出した。摘出した脳は4%パラホルムアルデヒド溶液にて後固定し、凍結切片標本を作製した。
3-デオキシ-1,5-AFの脳内投与が、室傍核オキシトシンニューロンを活性化することから、3-デオキシ-1,5-AFが室傍核オキシトシンニューロンに直接的に作用するかどうかを、マウス脳の室傍核から単離したオキシトシンニューロンを用いて調べた。細胞内Ca2+濃度の増加は、ニューロンからの神経伝達物質の放出を促進することから、ニューロンの活性化を細胞内Ca2+濃度を指標として、蛍光画像解析法を用いて調べた。
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013203707A (ja) | 2012-03-29 | 2013-10-07 | Nihon Starch Co Ltd | 1,5−d−アンヒドロフルクトースからなる抗肥満作用剤 |
| WO2016171165A1 (ja) | 2015-04-21 | 2016-10-27 | 国立大学法人鹿児島大学 | カスパーゼ1活性化阻害剤 |
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| JP2013203707A (ja) | 2012-03-29 | 2013-10-07 | Nihon Starch Co Ltd | 1,5−d−アンヒドロフルクトースからなる抗肥満作用剤 |
| WO2016171165A1 (ja) | 2015-04-21 | 2016-10-27 | 国立大学法人鹿児島大学 | カスパーゼ1活性化阻害剤 |
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